The Robert Bateman sketchbook is a sturdy, side-coil bound (top coil for the 3″ x 5″) sketchbook containing 50 sheets of acid free and 100% recycled paper. The bright white 110 lb paper holds up well under a wide variety of drawing media, and is perfect for ink drawings as the ink will not bleed through or spread. It holds up to aggressive erasing, and can handle light washes of tempera, acrylic, and watercolour.